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About 10,000 papers for “LED display”

LED display circuit.

Zeyu Ding (7363028), Wei Gong (112494) · Figshare · 2024

<div><p>Liquid level detection system is an essential core functional component of automatic clinical medical testing instrument. The conventional liquid level detection method has low detection accuracy and sensitivity, and may have the problem of false detection, which may lead to the inaccurate test results. This paper presents a high sensitivity liquid level detection system based on the principle of variable capacitance. When the sampling probe contacts the liquid level, the probe capacitance will change. The liquid level detection circuit board judges whether the probe contacts the liquid level by sensing the change of probe capacitance. When judging the liquid level signal, the combination of slope detection and amplitude detection is used. The liquid level detection circuit board takes the phase-locked loop(PLL) circuit as the center to detect the change of the capacitance. The reference signal of the PLL is set as a square wave of 375kHz. The double tube probe is used as a part of the tuning capacitor of the voltage controlled oscillator to control the frequency of the output signal, which can realize the rapid phase locking. The experimental results show that the system has accurate detection results, high sensitivity, stable and reliable operation, good dynamic response performance in the case of large and small liquid volume. Compared with other liquid level detection methods based on machine vision, ultrasonic, optics and so on, the proposed liquid level detection system has simpler structure and lower cost, it can avoid the problems of collision, carryover contamination and empty suction by controlling the depth of sampling needle inserted into liquid.</p></div>

Cited by 0Open access

Stereometric LED display

Kováč, Michal · Brno University of Technology Digital Library (Brno University of Technology) · 2013

Bakalárska práca sa zaoberá návrhom priestorového zobrazovača tvoreného sieťou RGB LED usporiadaných do matice 8x8x8. Práca rozoberá možnosti usporiadania diód vzhľadom k minimalizácii počtu vývodov ako aj výrobu navrhnutej siete. Zariadenie je ovládané pomocou obvodu FPGA na vývojovej doske Spartan-3 Starter Kit a v práci je popísaný obslužný obvod. Informácie o zobrazovanom texte a animáciach sú do obvodu prenášané z počítača pomocou rozhrania USB. Zobrazovač tvoria okrem Spartan-3 Starter Kit dve pripojené dosky, o ktorých návrhu práca taktiež pojednáva. Prvá predstavuje samotný priestorový zobrazovač s potrebnými komponentmi a druhá obstaráva komunikáciu s počítačom.

Cited by 0

Intelligent LED Display

Ryan, Alexander Joseph, Williams, Harrison Chabot, Stipanovich, Rayce Colemen · Digital WPI · 2014

The goal of this project is to increase the overall redundancy, and ease-of-use during installation and operation, of large-format LED video displays for the professional touring and outdoor display industry. Using design concepts found in large-scale redundant networks, the system dynamically scales video output to the LED display and provides adaptive real-time fault detection and failover behaviors to ensure reliability in rigorous outdoor environments. This ultimately simplifies installation of a system, eliminating the need for the individual addressing of panels and alignment of video content. The designed system is inherently redundant and the ability to sustain failure of its components increases with the size of the display making it ideal for live applications.

Cited by 0Open access

Led pov display

Цирульник, С. М., Роптанов, В. І., Николюк, Г. О. · Repository of Vinnytsia National Technical University (Vinnytsia National Technical University) · 2017

Запропоновано технічну реалізацію інформаційного табло з механічною розгорткою для відображення рекламної текстової та графічної інформації за рахунок явища Persistence of Vision.

Cited by 0Open access

The human LED display

Unknown · TU/e Research Portal (Eindhoven University of Technology) · 2019

Cited by 0

Modular graphic LED display

Rusinský, Jan · Brno University of Technology Digital Library (Brno University of Technology) · 2008

Tento dokument popisuje postup návrhu modulárního grafického LED displeje. Je rozdělen na dvě hlavní části. První část popisuje konstrukci elektronického zařízení ( architektura, použité součástky, návrh desek plošných spojů). Druhá část dokumentu je zaměřena na programové vybavení zařízení a na obslužný program pro osobní počítač.

Cited by 0

Modulr RGB LED display

Coufal, Miroslav · Brno University of Technology Digital Library (Brno University of Technology) · 2013

Cílem této diplomové práce byl návrh RGB LED displeje s rozhraním ethernet. Vytvořiljsem zobrazovací modul,řízený mikrokontrolérem Atmega 2560-16AU. Tyto moduly lze propojovat pomocí sériového standardu RS485. Připojení k ethernetu je realizováno pomocí zásuvného rozhraní, které využívá možností programovatelného modulu Rabbit RCM 3200. Návrh jsem zdokumentoval a navržené zařízení jsem ostestoval.

Cited by 0

Graphical modular LED display

Šutera, Libor · Brno University of Technology Digital Library (Brno University of Technology) · 2010

Project describing general setup and properties of mikroprocessors from series 8051 and properties of components, that are use in project. Next part describing process of construction and software equipment of mikroprocessor. The main direction of project is make a suggestion about driving of matrix with 8x8 RGB LED diode. Suggested mudular LED display complete with components and aktivate matrix. In last part write program for mikroprocessor for driving LED matrix a will be communicate with PC. And last write programe, which show accuracy of function.

Cited by 0

3D LED color display

Rak, Jan · Brno University of Technology Digital Library (Brno University of Technology) · 2015

Cílem této práce bylo navrhnout a zkonstruovat LED kostku pro zobrazování vizualizací a upoutání pozornosti. S ohledem na zadání bylo stanoveno rozlišení 8x8x8. Pro celkové řízení a komunikaci s PC byla zvolena vývojová deska STM32F4 Discovery, která díky svým parametrům plně postačuje pro tuto aplikaci. Kostka tvořená z diod a napájecích vodičů bude usazena na podstavci. Plochými vodiči bude připojena k desce s LED budiči, která bude obsahovat veškeré řídicí a komunikační členy. Implementovaný firmware bude mít v základu animace, taktéž jej bude možné řídit nadřazeným systémem. Podstavec bude potáhnut tkaninou pro lepší vzhled.

Cited by 0

Planar LED Display Application

Houserek, Jiří · Brno University of Technology Digital Library (Brno University of Technology) · 2011

Tato práce se zabývá teoretickým návrhem a zpracováním zařízení, jehož hlavním účelem je použití jako hodiny řízené DCF77 signálem, který je vysílán z Německa. Dále toto zařízení umožňuje použití budíku a zobrazení data. K zobrazení je použit maticový LED displej 8x32 ve formě modulu, který je k hlavní části propojen přes hranu. Celý přístroj je ovládán pomocí mikrokontroléru PIC16F877A. Je zde popsána problematika displejů, mikrokontrolérů a časového signálu DCF.

Cited by 0

LED Display Module, LED Screen Controller and LED Video Processor

eagerled · Bulletin of Miscellaneous Information (Royal Gardens Kew) · 2022

Eager-LED, a professional LED display manufacturer & exporter from Shenzhen China, eagers for long-term partnership worldwide. We supply Advertising LED screen, Rental LED display, Flexible LED screen, Front Service LED screen, poster LED display, transparent LED display and indoor HD LED display.

Cited by 0

Display LED Mekanis Berbasis Mikrokontroler

Andi Fitriati, Muhammad Akil, Arham Anwar · JTT (Jurnal Teknologi Terpadu) · 2016

Generally, a display LED which can display character in large numbers and needs many LEDs too. The aim of this research is to make display LED using 16 LEDs which arranged in horizontal. That display LED is well known in mechanical display LED or propeller LED that can display many characters. The work of mechanical display LED rotates lines of LEDs in high speed and utilizes the speed of LEDs blink alternately, so in the certain speed can form a character letter or number. The method used in this research is a quasi-experimental methods. Basically, this tool utilizes optical phenomenon commonly called Persistence of Vision. Persistence of Vision is the inability of the human eye to see a rapid change of image, so they translate as image sequence. Mechanical LED display is equipped with Infrared remote to give input in real time on the display. Sensor Hall-Effect in Mechanical LED display is used as position of display reference when the display rotates. Input is processed by microcontroller Atmega16A to control LED. The data which received by microcontroller was displayed in 16 LEDs that rotated by DC motor on 2400 rpm speed. Based on the result and observation of the project, the mechanical LED display can display clock using RTC IC. The communication with infrared remote can send well the data at maximum distance of 5 meters without obstructions.

Cited by 0Open access

Flat‐Panel Video LED Display

Information Display · 1981

LED STICK DISPLAYS: High performance 0.3" stick displays (foreground).now available from General Instruments.Palo Alto.CA. compl~ment 0.5 inch displays (background) introduced earlier this year.Displays achieve twice the light intensity performance per dollar over standard stick products. Flat-Panel Video LED DisplayOptotek Limited,

Cited by 0Open access